Machine for



unirsi) STAWENT QFFE,

ANDREW F. MERVINE, OF ST. LOUIS, MISSOURI.

I IVIACHINE FOR PR'ESSING BRICKS.

Specification of Letters Patent No. 382, dated September 12, 1837.

To all whom t may conc-em Be it known that I, ANDREW F. MERVINE, of thecity of St. Louis and State of Missouri, have invented a new and usefulMachine for Pressing Bricks, which is described as follows, referencebeing had to the annexed drawings of the same, making part of thisspecification.

This machine consists of a strong reetangular frame, marked A, composedof suitable pieces of timber, mortised and tenoned together, having aroller 9^ in front to facilitate the moving of it from place to place.Upon this frame is fixed by means of bolts b another rectangular frameB, of the same width as the frame A, and about two-thirds its length. Inthe side pieces of this frame, B, are erected two stout cheeks marked KK, for supporting the mold, and parts hereafter described, in 4which arecast grooves, L L, to admit a gate, or follower, M, to move up and downtherein, for raising, pressing and discharging the bricks. Also oblongapertures or slots, s, to admit the gudgeons of the roller c to playtherein.

The mold U in which the brick is pressed is made the size of a commonbrick, and is screwed on the top of the cheeks, K K, by bolts V.

The follower M for pressing the bricks on 'the under side is made in theshape of a common brick mold, turnedon edge, having a tongue .a a oneach end movingup and down in the grooves of the cheeks, by which it isguided and made to work true within the brick molds, without the dangerof wearing it smooth on the top, which presses the bricks, and furnished.with two ears e e on the bottom, between which is placed anantifriction roller, N, with a bolt passing through the ears and throughthe center of the roller-projecting sufficiently far to attach links II, extending vertically to the end of a lever, I), to which they areattached by a bolt passing through the ends of the same-the fulcrum ofwhich lever is on the under side of one of the cross pieces X of theframe B-its longer end being toward the links just mentioned.

Between the cheeks is placed a roller c whose gudgeons extend throughthe oblong apertures or slots s in the cheeks to which.

are attached two arms S Sone on each side of the frame, outside thecheeks,y eX- tending upward above the inold, connected together on thetop Ybya cap cl. Between the cap and inserted into the center of the topof the plate, by which it is brought immediately over the brick, byhand, when the pressure is to be given, by which it is removed when thebricks is to be discharged.

In thevcenter of the roller, O, is ale-ver E, whose larger end, or thatwhich unites with the roller, is made in the form of a cam, p, andbecoming the short end of the lever, whilst the roller, of which it is apart, serves as the fulcrum in bearing down the long end and raising theshort end, or cam, against the anti-friction roller N under thefollower, M, in order to give the brick a double pressure,simultaneously, on the top and bottom, between the follower and plate,by causing them to advance towards each other by means of the cam shapedend of the lever E, and the oblong slot-s in the cheeks. The long end ofthe lever E is connected by a link H to the end of a lever F, which issupported at its center by a vibrating roller D, whose gudgeons turn inears e e erected on the side pieces of the frame B-the roller beingmoved by means of a bar W inserted therein for that purpose: The otherend of the lever T bears upon the short end of the lever Z) fordepressing it and thus suddenly throwing up the follower to dischargethe brick. The plate at the same time is raised from the brick by meansof two projections, o, from the surface of the roller,

resting upon anti-friction rollers, P, turn- K ing on pins inserted intothe cheeks, said antrfriction rollers serving as fulcra to lever E inthrowing up the arms, S S, with the.V

2. In forming grooves in the cheeks to belovv by means of the beforedescribed com# cause the follower to Work true Without Ibineltion ofmechanical principles, is disvvearing the molds. claimed.

3. The arrangement of the levers for dis- ANDREW F. MERVINE. Y 5charging the bricks. Witnesses: f.

4. The principle of giving the brick a. si- THOMAS WEAVER, multaneouspressure from above as Well as GEORGE MEAD.

